Useful Formulas

Pump Output Horsepower: HP = GPM x PSI ÷ 1714

Pump Input Horsepower: HP = GPM x PSI ÷ 1714 ÷ E

Pump Input Torque (Lbs. ft.): T = CID x PSI ÷ 75.36

Gallons Per Minute: GPM = CID x RPM ÷ 231

Cubic Inches Displacement: CID = GPM x 231 ÷ RPM

Horse Power: HP = T x RPM ÷ 5252

Flow in GPM using P.T.O.: GPM = Engine RPM x P.T.O.% x CIR ÷ 231 x E

CCM Conversion: CCM = CID x 16.39

CID Conversion: CID = CCM x .06102

Abbreviations

HP = Horsepower

GPM = Gallons per Minute

CID = Cubic Inches Displacement

PSI = Pounds per Square Inch

RPM = Revolutions per Minute

E = Efficiency

T = Torque

CCM = Cubic Centimeter Displacement

BI = Bi Rotational

CCW = Counter Clockwise

CW = Clockwise

MIX = Mixed Porting

NPT = National Pipe Thread Ports

ODT = O-Ring Boss Ports

RP = Rear Ports

RV = Relief Valve

SP = Side Ports

SRP = Side and Rear